Just needs a little of that Jubilee wax that everyone on here is so excited about. Hated that greasy stuff. Think I remember when it came in a can. Smelled flammable like rocket fuel too.
If the seller were really smart he should have tied a rope around it and passed it off as a Titanic relic. Tuck these fake "Heart of the Ocean" earrings ($22 on Amazon) in the freezer for added for authenticity. I've heard people sometimes hide their tiaras and such in the freezer for security.